Increasing n3 fatty acids in lamb meat through different intensive feeding systems | Incremento de los ácidos grasos n3 en la carne de cordero mediante diversos sistemas de alimentación intensiva
2009
Cañeque, V., Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Madrid (España) | Lauzurica, S., Universidad Complutense de Madrid (España). Facultad de Veterinaria | Pérez, C., Universidad Complutense de Madrid (España). Facultad de Veterinaria | Díaz, M.T., Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Madrid (España) | Sánchez, C.I., Instituto Tecnológico Agrario de Castilla y León, Guijuelo, Salamanca (España). Estación Tecnológica de la Carne | Fernández, C., Instituto Tecnológico Agrario de Castilla y León, Guijuelo, Salamanca (España). Estación Tecnológica de la Carne | Álvarez, I., Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Madrid (España) | Fuente, J. de la, Universidad Complutense de Madrid (España). Facultad de Veterinaria
The present work studied dietary manipulation of fatty acid profile in lamb muscle, using vegetable and marine sources rich in n-3 polyunsaturated fatty acids (PUFA). Forty four Manchego breed lambs were feeding with four experimental diets: control, extruded linseed, microalgae plus extruded linseed and fish oil, since an initial live weight of 12 Kg until 26 Kg of live slaughter weight. Lamb weight and feed intake were weekly recorded. Fatty acid composition and TBARS values at 0 and 7 days were evaluated in muscle. Feed intake, average daily gain and hot and carcass weight were lower in lambs fed fish oil. Lambs fed supplemented diets, and mainly lambs fed fish oil diet, showed higher n3 fatty acids content than control group. The n6/n3 ratio was higher in lambs fed control diet (8.1) than in lamb fed linseed or microalgae plus linseed diets (2.3 y 2.6 respectively). Lambs fed fish oil diet had the lowest n6/n3 ratio (1.3). Consumption of 100 g of lamb muscle from lamb fed fish oil diet would represent near to 40% of the daily recommended consumption of long chain n3 fatty acids. The highest increment of TBARS values from 0 to 7 days occurred in lambs fed fish oil diet.
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